Mine Safety and Health Administration Metal and Nonmetal Mine Safety and Health Report of Investigation: Surface Nonmetal Mine (Sand and Gravel). Fatal Machinery Accident, October 10, 2006. American Aggregates of Michigan, Inc., Oxford Plant, Oxford, Oakl

摘要

Mark J. Hickmott, dredge operator, age 45, drowned on October 10, 2006, when the floating clamshell dredge he was operating capsized. Management policies, standards, and controls were inadequate and failed to ensure that the dredge was maintained in safe operating condition. The accident occurred because the dredge had been modified and used beyond the design capacity intended by the manufacturer. The high dredge alarm overload sensors were not set at the recommended settings; steel plating had been added to the front deck and crusher feed chute; one pontoon cell contained water and large rocks were stored on the dredge deck. These modifications impacted the stability of the dredge and contributed to the cause of the accident.